cast-iron

a cast-iron promise or arrangement is one that can be trusted completely (always before noun) No new business comes with a cast-iron guarantee of success.

Common Names:

Name	Pronounced	Usage
Amir (2)	ah-MEER	Hebrew
Stern	[stə:n]
Matan	-	Hebrew
Leyla	-	Arabic, Persian, Turkish, Azerbaijani, English (Modern)
Arcadia	ahr-KAY-dee-ə (English)	Various
ÁMbar	-	Spanish